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(No Modem 2 Sheets-Sheet 2.

' H. H. TAYLOR.

MACHINE FOR GUTTING'RIGHT AND LEFT THREADS 0N NIPPLES.

Patented May 21 1889.

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(No Model.) 2 Sheets-Sheet l.

H. H. TAYLOR. MACHINE FOR CUTTING RIGHT AND LEFT THREADS 0N NIPPLES. N0.403, 791. Patented May 21 1889.

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N, PETERS. Phnio-lilhognphur, Wishington. u. a

UNITED STATES PATENT OFFICE.

HARRISON H. TAYLOR, OF DETROI' MICHIGAN, ASSIGNOR TO THE MICHIGANRADIATOR AND IRON MANUFACTURING COMPANY, OF SAME PLACE.

MACHINE FOR CUTTING RIGHT AND LEFT THREADS ON NIPPLES.

SPECIFICATION forming part of Letters Patent No. 403,791, dated May 21,1889. Application filed September 25, 1888. Serial No. 286,352. (Nomodel.)

To all whom it may concern.

Be it known that I, HARRISON H. TAYLOR a citizen of the United States,residing at Detroit, county of lVayne, and State of Michigan, haveinvented certain new and useful Improvements in Screw-ThreadingMachines; and I declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, which form a part of this specification.

My invention relates to certain new and useful improvements inscrew-threading machines, and is more particularly designed forsimultaneously cutting right and left hand screw-threads upon a nipple,the threads being cut from the center toward the extremities toconstitute a right and left hand screwthreaded nipple for unitingsimultaneously adjacent hubs of radiator-loops, and any other uses towhich such a nipple is found adapted.

My invention consists of the combinations of devices and appliancesillustrated in the accompanying drawings, and more particularlyhereinafter described, and pointed out in the claims.

In the drawings, Figure 1 is a front end elevation of the deviceembodying my invention. Fig. 2 is a side elevation. Fig. 3 is a planview; and Fig. 4 is a vertical section, on the line m as, Fig. 1.

I carry out my invention as follows:

A represents any suitable support.

A A respectively represent sliding beds engaged upon said support, eachbed carrying a rotatable spindle (shown at A A provided with adriving-gear, a a, and at their adjacent ends with a multiple cutter, aa the one cutting a right and the other a left hand thread. The slidingbeds are screwtapped, as at a a", to receive a connectingspindle, Ascrew-threaded toward its extremities to engage the sliding beds, theunion of the spindle with one of the beds being a right and with theother bed a left hand screw-connection, the construction being such thatwhen the spindle is rotated said beds A A respectively, will haveopposite movements in the support A, thereby reciprocating the cutters a(1 toward and from each other, the sliding beds each carrying itsrespective spindle with it as it is moved to and fro. I prefer to recesseach bed, as shown at a, to receive a portion of the spindle, theextremities of the beds alone being screwtapped.

B represents a chuck of any suitable construction for carrying thenipple.

WVhile I do not confine myself to any specific construction of thechuck, I prefer that it should be provided with expansible jaws tointeriorly engage the nipple. Accordingly, I have shown a chuck of thisdescription in the drawings, in which E is a tubular spindle located ina laterally-movable block, A and having a rotatable engagement therein.The tubular spindle is provided at one extremity with movable jaws I),having spindle C sleeved therein and extending through the tubularspindle, the spindle C being constructed with wedge-shaped grooves 0adjacent to said jaws. Such a chuck is shown in my patent, No. 331,167,granted November 24, 1885.

The tubular spindle B is provided with a rotating gear, I), and thespindle C has a screwtapped engagement with an operating-handle, C,whereby the jaws may be expanded and permitted to contract as the handleis turned to or fro upon its spindle. By this means it is evident anipple, D, may be interiorly engaged by the expansible chuck and heldfirmly to the cutters.

E denotes a driving-pulley mounted upon the driving-shaft E, j ournaledin the support and extending across the machine, being provided towardthe extremity opposite the pulley with a pinion, e, meshing with thecorresponding gear a of the spindle A a pinion, 6, upon thedriving-shaft also meshing with the gear a upon the spindle A. By thismechanism the multiple cutters are driven.

F represents an additional driving-pulley upon the driving-shaft F, saidshaft being provided with a sprocket-wheel, F connected by asprocket-chain, F with a sprocket-wheel, G, upon a shaft, G, providedwith a worm, g, meshing with a worm-gear, I-I, loosely mounted upon thespindle A, and provided in turn with a gear, H, meshing with the gear b,located upon the tubular spindle B. The spindle A has a screw-tappedengagement with an operating or tightening handle, I, as shown at i.

F J is a tightening device engaging the chain In order to engage andremove the nipple readily, it is evident that the chuck should belaterally movable, so as to clear the nipple from the cutters. It is forthis reason that the tubular spindle of the chuck is engaged in asliding block, A. To manipulate said block to move it laterally, ascrew-cut shaft, K, is engaged therewith, as shown at 11;, said shaftalso having a screw-tapped engagement with a hanger, K, and providedwith an opcrating-handle, 76.

L is an adjustable stop to regulate the movement of the bed. Shouldnipples of different sizes be desired to be threaded, the stop can bemoved so as to allow the proper lateral adjustment of the chuck. Byrotating the handle the block will be laterally moved in a correspondingmanner.

M represents a tightening-screw for locking the screw K in any givenposition to hold the. block A in place.

The worm-gear H has a frictional engagement with the gear H, as shown inFig. at. As the worm-gear is loosely mounted upon the connecting-spindleA, serving as a feedscrew, it is evident that by loosening the handle Isaid worm-gear may continue to rotate; but the reciprocation of thesliding beds A A and the rotation of the chuck will cease. They varethus thrown out of operation. When it is desired to throw them intooperation, the handle I is tightened up, bringing the gear H intofrictional contact with the gear H. To return the cutters together, thedriving-power will be reversed.

The operation of the machine will now be understood.

What I claim is 1. In a screw-threading machine, the combination, with asupport, of rotatable reciprocatory cutter-spindles located end to end,and a rotatable laterally-movable chuck to hold the work adjacent to thecutters, substantially as set forth.

2. In a screw-threading machine, the combination, with a support, ofcutter-spindles, each having a rotatable and reciprocatory movement insaid support and located end to end, a rotatable chuckto hold the workadj acent to the cutters, and mechanism to simultaneously reciprocateand rotate such spindles, substantially as set forth.

3. In a screw-threading machine, the com- .bination, with a support, ofrotatable cutterprovided each with a cutter-spindle, substantially asset forth.

In a screw-threading machine, the combination, with a support, ofsliding beds A A cutter-spindles journaled in said beds, a rotatablechuck to engage the work, and mechanism to simultaneously reciprocatesaid beds and rotate said spindles, substantially as set forth.

6. In a screw-threading machine, the combination, with a support, ofsliding beds A A rotatable cutter-spindles journaled in said beds, afeed-screw having a right and left hand engagement with said beds, achuck to hold the work, and mechanism to rotate said feedscrew and saidchuck, substantially as set forth.

7. In a screw-threading machine, the combination, with a support, of arotatable chuck to engage the Work, sliding beds connected with afeed-screw having a right and left hand screw-tapped engagementtherewith, cutterspindles journaled insaid beds, worm-gear to rotatesaid feed-screw, and mechanism to rotate said worm-gear, substantiallyas set forth.

8. In a screw-threading machine, the combination, with a support, ofsliding beds A A a feed-screw having a right and left hand screw-tappedengagement with said beds, a worm-gear loosely mounted upon thefeedscrew, a handle having a screw-tapped engagement with said screw,whereby the gear may be tightened thereupon, and a Worm meshing withsaid gear, substantially as set forth.

In testimony whereof I sign this specification in'the presence of twowitnesses.

HARRISON H. TAYLOR.

Witnesses:

N..S. WRIGHT, CHAS. F. SALows.

